多文档上传文件

HttpFileCollection Files = HttpContext.Current.Request.Files;
            for (int i = 0; i < Files.Count; i++)
            {
                HttpPostedFile PostedFile = Files[i];
                if (PostedFile.ContentLength > 0)
                {
                    string FileName = PostedFile.FileName;
                    string strExPrentFile = FileName.Substring(FileName.LastIndexOf(".") + 1);

string sFilePath = "/uploadfile/hotel/" + StringClass.makeFileName24() + i + strExPrentFile;
                    PostedFile.SaveAs(Server.MapPath(sFilePath));
                }
                else
                {
                    //this.LabMessage.Text = "不能上传空文件";
                }
            }